unreal-mcp: Instructions file for Codex

AGENTS.md

unreal-mcp AGENTS.md is an instructions file for Codex, OpenCode from Flux-Point-Studios/unreal-mcp. It costs 1,124 tokens per session, scanned A, original, MIT.

Project instructions for an Unreal Engine 5 MCP server and its C++ plugin. Unreal Engine is a tool for building games and interactive 3D applications; MCP connects an agent to software tools.

In plain words
What is it for?
Use them when changing or reviewing the TypeScript server, Unreal C++ plugin, tool handlers, automation, configuration, or integration tests.
Why use it?
They give an agent the project’s structure, conventions, version context, and dual-process setup so it can work in the right places. They also point to the relevant tests and maintenance scripts.

Instructions file for CodexOpenCode

Written for Codex and OpenCode: the file is AGENTS.md.

This is Flux-Point-Studios/unreal-mcp's own configuration. It tells Codex and OpenCode how to work on unreal-mcp itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything unreal-mcp configures →

Reuse

Borrowing it

Nothing to install: this file belongs to Flux-Point-Studios/unreal-mcp. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/Flux-Point-Studios/unreal-mcp/main/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/Flux-Point-Studios/unreal-mcp

Made for: Codex, OpenCode.

Wrote this? Show the measurements

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Per session 1,124 This file is loaded in full into every session.
When invoked 1,124 The same file — it is already loaded in full.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.01124 $0.01124
Opus 5 $0.00562 $0.00562
Sonnet 5 $0.00225 $0.00225
Haiku 4.5 $0.00112 $0.00112

Measured 8d ago against content hash 560a8f58591f, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

unreal-mcp AGENTS.md scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 8d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

AGENTS.md · 81 lines

How it starts

The opening of the file, as written. The whole thing — 81 lines — stays where its author put it; the contents beside it link to each section on GitHub.

PROJECT KNOWLEDGE BASE

Generated: 2026-02-24 19:23:00 IST Commit: 02f9b17 Branch: main

OVERVIEW

MCP server for Unreal Engine 5 (5.0-5.7). Dual-process: TypeScript MCP server + C++ Bridge Plugin. 36 consolidated tools with action-based dispatch. Version 0.5.18.

STRUCTURE

./
├── src/                    # TS Server (NodeNext ESM)
│   ├── tools/              # Tool definitions + handlers
│   │   ├── consolidated-tool-definitions.ts  # Action enums + schemas (212KB)
│   │   ├── consolidated-tool-handlers.ts     # Tool routing
│   │   └── handlers/       # Domain handlers (40 files)
│   ├── automation/         # Bridge Client & Handshake (9 files)
│   ├── utils/              # Normalization & Security
├── Plugins/                # UE Plugin (C++) — note: "Plugins" not "plugins"
│       ├── Source/         # Native Handlers (56 files) & Subsystem
│       └── Config/         # Plugin Settings
├── tests/                  # Integration + Unit Tests
│   ├── test-runner.mjs     # Custom MCP test runner (1100+ lines)
│   └── mcp-tools/          # Domain-specific test files (core/world/authoring/gameplay/utility)
└── scripts/                # Maintenance & CI Helpers

WHERE TO LOOK

Task Location Notes
Add MCP Tool src/tools/consolidated-tool-definitions.ts Add action enum + schema
Route Tool src/tools/consolidated-tool-handlers.ts Register in registerDefaultHandlers()
Implement Handler src/tools/handlers/*-handlers.ts Call executeAutomationRequest()
Add UE Action Plugins/.../Private/*Handlers.cpp Register in Subsystem::InitializeHandlers()
Fix UE Crashes McpAutomationBridgeHelpers.h Use McpSafeAssetSave for 5.7+
Path Handling src/utils/normalize.ts Force /Game/ prefix
CI Workflows .github/workflows/ All actions use commit SHAs (secure)
Version Sync .github/workflows/bump-version.yml Updates 4 files atomically

CONVENTIONS

Read the full file on GitHub · 81 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 8d ago First seen · 81 lines · 1,124 tokens per session scan A 560a8f58591f

Subscribe to this mod's changes

unreal-mcp AGENTS.md is an instructions file published in the GitHub repository Flux-Point-Studios/unreal-mcp (8 stars, last pushed 4mo ago), licensed MIT. It adds 1,124 tokens to every session, about $0.0056 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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